Theresa L. Windus Eric J. Bylaska Michel Dupuis So Hirata Lisa Pollack Dayle M. Smith Tjerk P. Straatsma Edoardo Aprà NWChem: New Functionality. 168-180 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2660&spage=168 2003 conf/iccS/2003-4 International Conference on Computational Science db/conf/iccS/iccS2003-4.html#WindusBDHPSSA03